Loose-leaf binder.



PATENTED JU Y 9, 1907. E. L. KRAG. LOOSE LEAF BINDER APPLICATION FILEDAPR. 27, 1901.

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ERIK L. KRAG, OF CHICAGO, ILLINOIS.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented July 9, 1907.

Application filed April 27, 1907. Serial No. 370,626.

To all whom it may concern:

Be it known that I, ERIK L. Knlie, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Loose-Leaf Binders, ofwhich the following is a description, reference being had to theaccompanying drawings, forming a part of this specification, in whichcorresponding letters of reference in the different figures indicatelike parts.

The object of my invention is to provide a loose-leaf binder which maybe composed of sections arranged to slide within or telescope with eachother, said sections being stamped or otherwise formed from sheet metaland so constructed as to enable the usual binding posts or otheranalogous elements heretofore deemed essential, to be dispensed with.

To these ends my invention consists in the combination of elementshereinafter more particularly described and definitely pointed out inthe claims.

In the drawings, Figure 1, is a face view embodying the features of myinvention, Fig. 2, is a sectional view taken upon the line 2, Fig. 4,viewed in the direction of the arrow there shown, Fig. 3, is a like viewshowing the parts of the frame expanded, Fig. 4, is a horizontalsectional view taken upon the line i Fig. 2, viewed in the direction ofthe arrow there shown, the manner of securing the leaves being indicatedin said device, Fig. 5, is a vertical sectional view taken upon the line5, Fig. 2, viewed in the direction of the arrow there shown, and Fig. 6,is a perspective view of a portion of one of the outer sections showingthe formation at the end for the purpose of positioning the leaves.

Referring to the drawings, 0. indicates generally the case or frame ofmy improved device, which is formed from a plurality of preferably threesections 1), c and d, which parts, so indicated, constitute the back ofthe structure. Each of the parts Z) and c, has a flange formed thereonat substantially right angles thereto, which flanges are indicated by eand f, respectively, and serve as the sides or clamping elements .bywhich the leaves are compressed as hereinafter stated. When cut from theblank, the parts I), c and d are made considerably longer than the partsa and f, the extended v portions at each end being bent at right anglesto said back portions as shown at g, h and 1', respectively, from whencethey are again bent at right angles and parallel to the back portions asindicated atj, k and Z.

The middle section d, is enough shorter than the outer section b toenable it to fit loosely within the latter, as indicated in Figs. 2, 3,4 and 5, while the section 0 is correspondingly shortened to fit withinthe section (Z in the same manner. The flanges j, 70, Z aresubstantially parallel to and in substantial alinement with the frontedges of the binding flanges e, f. These flanges serve, in lieu of theordinary posts, to position and temporarily secure the leaves m, Fig. 4,which are notched upon opposite edges, as shown at n in said last namedfigure, to receive said flanges. Flanges 0, p are bent from the parts g,h to overlap the parts a, f, respectively, to which they are riveted, asshown at q, Fig. 6, or otherwise rigidly secured.

Any well known form of locking device may be employed for clamping theside flanges upon the leaves; but I prefer that shown in the drawings,which may be constructed as follows: Rigidly attached to the inner faceof the section (Z are bearings r in which is j ournaled a shaft 8, theends of which are reduced in size and provided with right and left-handscrew-threads t, it, upon which are mounted screw-threadedsleeves 1),having lugs thereon which are jointedly connected by means of links into lugs 0;, upon the inner faces of the sides a and f. A squared portiony, at the end, enables the shaft to be rotated by means of a suitablekey. By turning the shaft in one direction the sleeves n are forcedapart, through the action of the links, which serve to draw the sides sand f together and clamp them upon the intervening leaves. A reverseaction serves to separate said sides as shown in Fig. 3.

Notches 2, Figs. 1 to 5, inclusive are formed in the part c to permit itto slide past the bearing brackets 1', while notches z, z Figs. 2, 3, 4and 5, are formed in the end pieces g, h, respectively, to receive thelocking shaft and enable said end pieces to telescope with each other.

From the foregoing it will be seen that, outside of the actuating orlocking mechanism, my improved device is composed preferably of thethree telescoping elements formed from sheet metal and having inturnedend flanges to engage with notches in the leaves. This construction,while durable and efficient, greatly reduces the cost of the device andespecially adapts it to the requirements of small books. Should butlittle expansion be required, the middle section may be dis pensed with,but I prefer ordinarily to use three or more sections.

Having thus described my invention, I claim:

1. A looseleaf binder, in which is comprised a plurality of sectionsarranged to telescope with each other, said combined sections forming anexpansible case for inclosing one edge, with portions of the sides andends of the leaves.

2. The combination in a loose-leaf binder, of a plurality of telescopingsections arranged to inclose portions of the sides and edges of theleaves to be bound, said section being bent forwardly and thenceinwardly at the ends to enter notches formed in the leaves.

3. In a loose-leaf'binder, the combination of a series of sheet-metaltelescoping sectio'ns successively nested within each other, eachsection having forwardly and inwardly bent portions for engaging notchesin the leaves, the outermost sections having side flanges for clampingsaid leaves.

4. In a loose-leaf hinder, the combination of a series of sheet metalclamping sections, nested in successive order, one within the other, toslide in a direction at right angles to their length, each section beingprovided with forwardly and inwardly bent end-portions to engage notchesin the leaves to be bound, and locking means for connecting the clampingsections.

5. The combination in a loose-leaf binder of a series of sheet metalsections nested in successive order one within the other to slide in adirection at right angles to their length, each section being providedwith forwardly and inwardly bent end portions to engage notches in theleaves to be bound, the outermost sections having side flanges forengaging the leaves to be bound and locking means for clamping said sideflanges upon the leaves.

6. The combination in a lo0se-leaf binder of a series of sheet metalsections nested to telescope one within the other in a direction atright angles to their length, each of said sections having inwardlyturned end flanges ar ranged in planes parallel to each other as well asto the backs of said sections, and means for connecting and look ing theoutermost sections.

7. The combination in a loose-leaf binder, of a series of sheetanetalsections nested to telescope one Within the other in a direction atright angles to their length, each of said sections having inwardlyturned endflanges Plranged in planes parallel to each other as Well asto the backs of said sections, a right and left-hand screw-threadedshaft mounted in bearings upon the middle section, screwthreaded sleevesupon said shafts, and links for connecting said sleeves in oppositedirections to the outermost sections. In testimony whereof, I havesigned this speciiication in the presence of two subscribing witnesses,this 24th day of April, 1907.

ERIK L. KRAG. Witnesses DAVID H. FLETCHER, CARRIE l6. JORDAN.

